Sidelink Resource Selection Using Position Characteristics
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Solution Overview
Problem
Current 3GPP 5G technology faces challenges in efficiently selecting resources for sidelink communication, particularly in balancing resource collision and spectrum efficiency when slot level and sub-slot level sidelink transmissions coexist in the same resource pool.
Innovation Solution
A UE is configured with a processor to obtain a position characteristic configuration associated with a resource pool, which includes availability levels of positions in SL slots for simultaneous sub-slot and slot level transmissions. The UE performs sensing-based resource selection or re-selection based on this configuration, determining resource reservation patterns and calculating availability weights to prioritize resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing-based resource selection is performed without position characteristic configuration, then resource selection simplicity is maintained, but resource collision increases when slot level and sub-slot level transmissions coexist
Solution Approach 1:
The system performs preliminary configuration of position characteristic information before resource selection occurs. The base station pre-configures the UE with position characteristic configurations indicating availability levels of different positions in SL slots, enabling the UE to make informed resource selection decisions without performing complex real-time analysis of slot level and sub-slot level transmission interactions.
Solution Approach 2:
The patent introduces position characteristic configuration parameters that indicate availability levels (e.g., first availability level for positions available for sub-slot transmission without affecting slot transmission, second availability level for positions not available). These parameter changes enable differentiated resource selection based on position characteristics, resolving the contradiction between collision minimization and selection simplicity.
2Productivity
If resource reservation patterns are determined without position characteristic information, then processing speed is maintained, but spectrum efficiency decreases due to sub-optimal resource allocation
Solution Approach 1:
The patent applies local quality by treating different positions within SL slots differently based on their characteristics. Position characteristic configurations are provided for specific positions (e.g., first position, second position, third position) with different availability levels. This enables the resource selection to optimize spectrum efficiency locally at each position rather than applying uniform resource allocation rules across the entire slot.
Solution Approach 2:
Position characteristic information is pre-configured by the base station before the UE performs resource reservation pattern determination. This preliminary provision of position-specific availability level information enables efficient spectrum utilization without requiring complex real-time analysis during resource selection.
3Productivity
If availability levels are not differentiated for different positions, then configuration simplicity is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent introduces position characteristic configuration parameters that differentiate availability levels for different positions within SL slots. The base station configures the UE with specific parameters indicating whether each position is available for sub-slot level transmission and at what availability level. This parameter-based differentiation enables improved resource utilization efficiency while keeping the configuration mechanism relatively simple and structured.
Solution Approach 2:
The SL slot is segmented into different positions (first position, second position, third position, etc.), and each position is assigned a specific availability level through position characteristic configurations. This segmentation allows the system to optimize resource utilization at the position level rather than treating the entire slot as a single resource unit, improving overall resource utilization efficiency.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses of resource selection for sidelink (SL) communication. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain a position characteristic configuration associated with a resource pool based on configuration or pre-configuration, wherein the position characteristic configuration includes a set of position characteristics, and each position characteristic indicates an availability level of a position in an SL slot for simultaneous sub-slot level transmission and slot level transmission; and perform a sensing-based resource selection or re-selection based at least in part on the position characteristic configuration; a transmitter coupled to the processor; and a receiver coupled to the processor.